pub const GLYPH_UNKNOWN_FLAG: Glyph = ffi::PANGO_GLYPH_UNKNOWN_FLAG /* 268_435_456u32 */;Expand description
Flag used in PangoGlyph to turn a gunichar value of a valid Unicode
character into an unknown-character glyph for that gunichar.
Such unknown-character glyphs may be rendered as a ‘hex box’.